Moles (1) The mole and Avogadro Flashcards
1
Q
Define the term relative atomic mass
A
The weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12
2
Q
Define the term relative molecular mass
A
The weighted mean mass of a simple covalent molecule compared with 1/12 of the mass of an atom of carbon-12
3
Q
What is a mole?
A
The amount of substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12
This number is 6.02x10^23 (avogadro constant)
4
Q
Define the term molar mass
A
The mass, in g, per mole of a substance (units are gmol-1
5
Q
What is the equation for working out mass of a substance?
A
mass = Mr x mol
6
Q
What is the equation of working u=out the number of particles present in a certain substance?
A
No. of particles = 6.02x10^23 x mol
